As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, THE CREW NOTICED THAT THERE WAS A LOSS OF COMMUNICATION / AVIONICS ISSUE BETWEEN THE CAPTAIN AND THE FIRST OFFICER. REPORTED TO THE DISPATCHER THAT THEY DID A LOW ENERGY ABORTED TAKEOFF AND WERE RETURNING TO THE GATE FOR MAINTENANCE PROCEDURES. REMOVED AND REPLACED REU, OPS CHECKS GOOD.